Currency

Each currency is represented by a symbol of 3 letters EUR for Euro, USD for U.S. dollars, Japanese yen JPY, ...

Currencies are always traded in pairs, it is not possible to buy or sell one currency alone.
For example the EUR / USD is the price of the euro against the dollar. If the EUR / USD rises, it means that the euro has been appreciated against the dollar. And conversely if the EUR / USD decrease.

It usually displays the evolution of the course in a chart. A graph follows the prize value over time.

Currencies are taking or losing value depending on the economical conditions in countries (deterioration -> decrease and Improvement -> increase). The monetary policy plays also an important role in their scoring: a policy of inflationary type (massive impression of new notes and general rise of prices and wages) will be a strong downward impact of one currency compared to another.

The dollar is far the most traded currency.
The most missing currency is the  Chinese yuan, because  authorities refused his free trade to maintain it at an abnormally low (dumping of imports)

Currency     Symbol
ARS           Argentine Peso
GRD          Greek drachma
PLN           Polish Zloty
AUD          Australian Dollar
HKD          Hong Kong Dollar
SEK           Swedish Krona
BRL           Brazilian Real
HUF          Hungarian forint
SGD          Singapore Dollar
CAD         Canadian Dollar
ILS            Israeli Shekel
SKK         Slovak Koruna
CHF          Swiss Franc
INR           Indian Rupee
THB          Thai Baht
CZK         Czech Koruna
JPY           Japanese Yen
TRY         Turkish Lira
DKK        Danish Krone
MXN        Mexican Peso
USD         U.S Dollar
EEK          Estonian Kroon
MYR         Malaysian Ringgit
ZAR          South African Rand
EUR          Euro
NOK        Norwegian Krone
GBP          Pound Sterling English
NZD         New Zealand Dollar